WO1998020623A3 - System and method of downconversion where the received signal is downconverted - Google Patents

System and method of downconversion where the received signal is downconverted Download PDF

Info

Publication number
WO1998020623A3
WO1998020623A3 PCT/NO1997/000292 NO9700292W WO9820623A3 WO 1998020623 A3 WO1998020623 A3 WO 1998020623A3 NO 9700292 W NO9700292 W NO 9700292W WO 9820623 A3 WO9820623 A3 WO 9820623A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
downconversion
received signal
frequency
transmitted
Prior art date
Application number
PCT/NO1997/000292
Other languages
French (fr)
Other versions
WO1998020623A2 (en
Inventor
Tor Kveim
Terje Roeste
Original Assignee
Nera Asa
Tor Kveim
Terje Roeste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nera Asa, Tor Kveim, Terje Roeste filed Critical Nera Asa
Priority to EP97910642A priority Critical patent/EP0976202A2/en
Priority to AU47952/97A priority patent/AU4795297A/en
Priority to US09/297,275 priority patent/US6516023B1/en
Publication of WO1998020623A2 publication Critical patent/WO1998020623A2/en
Publication of WO1998020623A3 publication Critical patent/WO1998020623A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/408—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency the transmitter oscillator frequency being identical to the receiver local oscillator frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transceivers (AREA)

Abstract

A system and method for simultaneous transmission and receival where the received signal (24) is downconverted in a downconverting unit (25) by using a portion (35) of the transmitted modulated signal (31) as LO for the downconversion. The downconversion is performed to an intermediate frequency signal (26) having a frequency (f2)-(f1) equal to the difference between the frequency (f2) of the transmitted signal and the frequency (f1) of the received signal. There is provided a common antenna (20) for transmitting and receiving, and a duplex filter (21) in front of the antenna (20) to separate the transmitted signal (29) and the received signal (22), with the transmitter data (34) on the transmitter side having been applied to a modulator (33). In front of the duplex filter on the transmitter side is provided a power amplifier (30). On the receiver side there is, in addition, provided a demodulator (27) to permit withdrawal of user data (28) for the user on the receiver side. Compensation for the modulation introduced by the signal (35) in the downconversion unit (25) is provided in the receiver by a device where the transmitted phase (46a) is used as a reference, delayed in a time delay unit (53) by an appropriate delay, and where this delay unit may be estimated and updated in order to compensate for variable delay in the outer signal path.
PCT/NO1997/000292 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted WO1998020623A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP97910642A EP0976202A2 (en) 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted
AU47952/97A AU4795297A (en) 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted
US09/297,275 US6516023B1 (en) 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO964695A NO305499B1 (en) 1996-11-06 1996-11-06 Downconversion system and method in which the received signal is downconverted
NO964695 1996-11-06

Publications (2)

Publication Number Publication Date
WO1998020623A2 WO1998020623A2 (en) 1998-05-14
WO1998020623A3 true WO1998020623A3 (en) 1998-07-09

Family

ID=19900011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1997/000292 WO1998020623A2 (en) 1996-11-06 1997-11-06 System and method of downconversion where the received signal is downconverted

Country Status (5)

Country Link
US (1) US6516023B1 (en)
EP (1) EP0976202A2 (en)
AU (1) AU4795297A (en)
NO (1) NO305499B1 (en)
WO (1) WO1998020623A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343567B (en) * 1998-11-05 2002-03-20 Nec Technologies Digital transmit loop
FI112741B (en) 1998-11-26 2003-12-31 Nokia Corp Method and arrangement for transmitting and receiving RF signals at various radio interfaces of communication systems
US6516183B1 (en) * 1999-09-10 2003-02-04 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for disturbance compensation of a direct conversion receiver in a full duplex transceiver
US6597459B2 (en) * 2000-05-16 2003-07-22 Zygo Corporation Data age adjustments
GB2363267B (en) * 2000-06-07 2002-08-07 Motorola Israel Ltd Circuit and method for signal phase control in a radio transceiver
US6735181B1 (en) * 2000-06-26 2004-05-11 Atmel Corporation Wireless transceiver with subtractive filter compensating both transmit and receive artifacts
US7519333B2 (en) * 2000-07-03 2009-04-14 Texas Instruments Incorporated Radio architecture for use with frequency division duplexed systems
US6975406B2 (en) 2001-08-02 2005-12-13 Zygo Corporation Glitch filter for distance measuring interferometry
JP2006261714A (en) * 2005-03-15 2006-09-28 Renesas Technology Corp Semiconductor integrated circuit for communication and portable communication terminal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171997A1 (en) * 1984-08-09 1986-02-19 BRITISH TELECOMMUNICATIONS public limited company Duplex microwave equipment with a single microwave oscillator
GB2228379A (en) * 1989-01-13 1990-08-22 Telenokia Oy Frequency-modulated transceiver
GB2228378A (en) * 1989-01-13 1990-08-22 Telenokia Oy Frequency-modulated transceiver
US5493701A (en) * 1991-08-29 1996-02-20 Nokia Telecommunications Oy Frequency-modulated transceiver having a third mixer for generating an outermediate-frequency local oscillator signal from modulated output signal of a high frequency oscillator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5422909A (en) * 1993-11-30 1995-06-06 Motorola, Inc. Method and apparatus for multi-phase component downconversion
US5966416A (en) * 1996-11-21 1999-10-12 Dsp Group, Inc. Verification of PN synchronization in a spread-spectrum communications receiver

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171997A1 (en) * 1984-08-09 1986-02-19 BRITISH TELECOMMUNICATIONS public limited company Duplex microwave equipment with a single microwave oscillator
GB2228379A (en) * 1989-01-13 1990-08-22 Telenokia Oy Frequency-modulated transceiver
GB2228378A (en) * 1989-01-13 1990-08-22 Telenokia Oy Frequency-modulated transceiver
US5493701A (en) * 1991-08-29 1996-02-20 Nokia Telecommunications Oy Frequency-modulated transceiver having a third mixer for generating an outermediate-frequency local oscillator signal from modulated output signal of a high frequency oscillator

Also Published As

Publication number Publication date
EP0976202A2 (en) 2000-02-02
NO305499B1 (en) 1999-06-07
WO1998020623A2 (en) 1998-05-14
AU4795297A (en) 1998-05-29
NO964695L (en) 1998-05-07
NO964695D0 (en) 1996-11-06
US6516023B1 (en) 2003-02-04

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